<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>Document</title>
</head>
<body>
	<!-- 默认情况下单选 -->
	<select name="" id="">
	<option value="1">111</option>
	<option value="2">222</option>
	<option value="3">333</option>
	<option value="4">4444</option>
	</select>


	       <select   multiple>
			<option value="1">111</option>
			<option value="2">222</option>
			<option value="3">333</option>
			<option value="4">4444</option>
			</select>
		
		



</body>
</html>